i have an ESS installation containing 3 quattro 8000VA connect parallel with 15KVA Fronius also i have MPPT 150|60 also connected to charge the batteries when the FRONIUS isn't working (off). cant get the mppt and Fronius to charge together under 60A(my battery bank max initial current), i can get the quattro to regulate FRONIUS charging current but its seems the charger is getting regulated